mirror of
https://github.com/explosion/spaCy.git
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314 lines
11 KiB
Plaintext
314 lines
11 KiB
Plaintext
//- Docs > API > Doc
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//- ============================================================================
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+section('doc')
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+h2('doc', 'https://github.com/' + profiles.github + '/spaCy/blob/master/spacy/tokens/doc.pyx#L58')
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| #[+label('tag') class] Doc
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p
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| A sequence of #[code Token] objects. Access sentences and named entities,
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| export annotations to numpy arrays, losslessly serialize to compressed
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| binary strings.
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+aside.
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Internally, the #[code Doc] object holds an array of #[code TokenC] structs.
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The Python-level #[code Token] and #[code Span] objects are views of this
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array, i.e. they don't own the data themselves.
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+code('python', 'overview').
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class Doc:
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def __init__(self, vocab, orths_and_spaces=None):
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return self
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def __getitem__(self, int i):
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return Token()
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def __getitem__(self, slice i_j):
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return Span()
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def __iter__(self):
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yield Token()
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def __len__(self):
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return int
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def __unicode__(self):
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return unicode
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def __bytes__(self):
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return utf8
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def __repr__(self):
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return unicode
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@property
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def text(self):
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return unicode
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@property
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def text_with_ws(self):
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return unicode
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@property
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def vector(self):
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return numpy.ndarray(dtype='float32')
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@property
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def vector_norm(self):
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return float
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@property
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def ents(self):
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yield Span()
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@property
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def noun_chunks(self):
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yield Span()
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@property
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def sents(self):
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yield Span()
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def similarity(self, other):
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return float
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def merge(self, start_char, end_char, tag, lemma, ent_type):
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return None
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def to_array(self, attr_ids):
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return numpy.ndarray(shape=(len(self), len(attr_ids)), dtype='int64')
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def count_by(self, attr_id, exclude=None, counts=None):
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return dict
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def to_bytes(self):
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return bytes
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def from_array(self, attrs, array):
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return None
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def from_bytes(self, data):
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return self
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@staticmethod
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def read_bytes(file_):
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yield bytes
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+section('doc-init')
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+h3('doc-init')
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| #[+label('tag') method] Doc.__init__
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.has-aside
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+code('python', 'definition').
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def __init__(self, vocab, orths_and_spaces=None):
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return Doc
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+aside('Implementation').
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This method of constructing a #[code Doc] object is usually only used
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for deserialization. Standard usage is to construct the document via
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a call to the language object.
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+table(['Name', 'Type', 'Description'], 'params')
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+row
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+cell vocab
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+cell.
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A Vocabulary object, which must match any models you want to
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use (e.g. tokenizer, parser, entity recognizer).
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+row
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+cell orths_and_spaces
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+cell.
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A list of tokens in the document as a sequence of
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#[code (orth_id, has_space)] tuples, where #[code orth_id]
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is an integer and #[code has_space] is a boolean, indicating
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whether the token has a trailing space.
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+section('doc-sequenceapi')
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+h3('doc-sequenceapi')
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| #[+label('tag') Section] Sequence API
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+table(['Example', 'Description'], 'code')
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+row
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+cell #[code.lang-python doc[i]]
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+cell.
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Get the Token object at position i, where i is an integer.
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Negative indexing is supported, and follows the usual Python
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semantics, i.e. doc[-2] is doc[len(doc) - 2].
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+row
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+cell #[code.lang-python doc[start : end]]
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+cell.
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Get a #[code Span] object, starting at position #[code start]
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and ending at position #[code end], where #[code start] and
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#[code end] are token indices. For instance,
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#[code doc[2:5]] produces a span consisting of
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tokens 2, 3 and 4. Stepped slices (e.g. #[code doc[start : end : step]])
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are not supported, as #[code Span] objects must be contiguous
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(cannot have gaps). You can use negative indices and open-ended
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ranges, which have their normal Python semantics.
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+row
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+cell #[code.lang-python for token in doc]
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+cell.
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Iterate over Token objects, from which the annotations can
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be easily accessed. This is the main way of accessing Token
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objects, which are the main way annotations are accessed from
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Python. If faster-than-Python speeds are required, you can
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instead access the annotations as a numpy array, or access the
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underlying C data directly from Cython.
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+row
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+cell #[code.lang-python len(doc)]
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+cell.
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The number of tokens in the document.
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+section('doc-spans')
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+h3('doc-spans-sents')
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| #[+label('tag') property] Doc.sents
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p.
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Yields sentence #[code Span] objects. Sentence spans have no label.
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To improve accuracy on informal texts, spaCy calculates sentence
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boundaries from the syntactic dependency parse. If the parser is disabled,
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the #[code sents] iterator will be unavailable.
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+code('python', 'Example').
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from spacy.en import English
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nlp = English()
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doc = nlp("This is a sentence. Here's another...")
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assert [s.root.orth_ for s in doc.sents] == ["is", "'s"]
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+h3('doc-spans-ents')
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| #[+label('tag') property] Doc.ents
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p.
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Yields named-entity #[code Span] objects, if the entity recognizer
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has been applied to the document. Iterate over the span to get
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individual Token objects, or access the label:
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+code('python', 'Example').
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from spacy.en import English
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nlp = English()
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tokens = nlp(u'Mr. Best flew to New York on Saturday morning.')
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ents = list(tokens.ents)
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assert ents[0].label == 346
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assert ents[0].label_ == 'PERSON'
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assert ents[0].orth_ == 'Best'
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assert ents[0].text == 'Mr. Best'
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+h3('doc-spans-nounchunks')
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| #[+label('tag') property] Doc.noun_chunks
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p.
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Yields base noun-phrase #[code Span] objects, if the document
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has been syntactically parsed. A base noun phrase, or
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'NP chunk', is a noun phrase that does not permit other NPs to
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be nested within it – so no NP-level coordination, no prepositional
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phrases, and no relative clauses. For example:
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+code('python', 'Example').
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from spacy.en import English
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nlp = English()
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doc = nlp(u'The sentence in this example has three noun chunks.')
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for chunk in doc.noun_chunks:
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print(chunk.label_, chunk.orth_, '<--', chunk.root.head.orth_)
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+section('doc-exportimport-toarray')
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+h3('doc-exportimport-toarray')
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| #[+label('tag') method] Doc.to_array
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p.
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Given a list of M attribute IDs, export the tokens to a numpy
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#[code ndarray] of shape #[code N*M], where #[code N] is the length
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of the document. The values will be 32-bit integers.
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+code('python', 'Example').
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from spacy import attrs
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doc = nlp(text)
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# All strings mapped to integers, for easy export to numpy
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np_array = doc.to_array([attrs.LOWER, attrs.POS, attrs.ENT_TYPE, attrs.IS_ALPHA])
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+code('python', 'definition').
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def to_array(self, attr_ids):
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return numpy.ndarray(shape=(len(self), len(attr_ids)), dtype='int64')
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+table(['Name', 'Type', 'Description'], 'params')
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+row
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+cell attr_ids
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+cell list of ints
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+cell.
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A list of attribute ID ints. Attribute IDs can be imported
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from #[code spacy.attrs] or #[code spacy.symbols].
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+section('doc-exportimport-countby')
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+h4('doc-exportimport-countby')
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| #[+label('tag') method] Doc.count_by
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p.
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Produce a dict of #[code {attribute (int): count (ints)}] frequencies,
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keyed by the values of the given attribute ID.
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+code('python', 'Example').
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def count_by(self, attr_id):
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return dict
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+table(['Name', 'Type', 'Description'], 'params')
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+row
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+cell attr_id
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+cell int
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+cell.
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The attribute ID to key the counts.
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+section('doc-exportimport-fromarray')
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+h4('doc-exportimport-fromarray')
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| #[+label('tag') method] Doc.from_array
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p.
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Write to a #[code Doc] object, from an M*N array of attributes.
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+code('python', 'definition').
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def from_array(self, attrs, array):
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return None
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+section('doc-exportimport-frombytes')
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+h4('doc-exportimport-frombytes') Doc.from_bytes
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p.
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Deserialize, loading from bytes.
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+code('python', 'definition').
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def from_bytes(self, byte_string):
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return Doc
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+section('doc-exportimport-tobytes')
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+h4('doc-exportimport-tobytes')
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| #[+label('tag') method] Doc.to_bytes
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p.
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Serialize, producing a byte string.
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+code('python', 'definition').
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def to_bytes(self):
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return bytes
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+section('doc-exportimport-readbytes')
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+h4('doc-exportimport-readbytes')
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| #[+label('tag') method] Doc.read_bytes
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p.
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A static method, used to read serialized #[code Doc] objects from
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a file. For example:
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+code('python', 'Example').
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from spacy.tokens.doc import Doc
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loc = 'test_serialize.bin'
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with open(loc, 'wb') as file_:
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file_.write(nlp(u'This is a document.').to_bytes())
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file_.write(nlp(u'This is another.').to_bytes())
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docs = []
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with open(loc, 'rb') as file_:
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for byte_string in Doc.read_bytes(file_):
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docs.append(Doc(nlp.vocab).from_bytes(byte_string))
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assert len(docs) == 2
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+code('python', 'definition').
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@staticmethod
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def read_bytes(file_):
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yield bytes
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